LOINCActiveBoth

LOINC Code 21754-7: AR gene CAG repeats Molgen Ql (Bld/Tiss)

21754-7 is a LOINC code used to identify AR gene CAG repeats Molgen Ql (Bld/Tiss) in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component AR gene.CAG repeats. It is commonly used with the system or sample type Bld/Tiss.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component AR gene.CAG repeats. It is commonly used with the system or sample type Bld/Tiss.

When is it used?

  • Used in lab systems, EHRs, and clinical data exchange.
  • May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
  • Status: ACTIVE
  • Order vs observation: Both
  • Method: Molgen

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • AR gene CAG repeats [Presence] in Blood or Tissue by Molecular genetics method
  • AR gene.CAG repeats
  • AIS; androgen receptor; Androgen receptor gene; AR gene CAG Rpt; Blood; DHTR; Dihydrotestosterone receptor gene; Genetics; Heredity; Heritable; HUMARA; HYSP1; Inherited; KD; Kennedy disease; Molecular genetics; Molecular pathology; MOLPATH; MOLPATH.NUCREPEAT; NR3C4; Ordinal; PCR; Point in time; PR; QL; Qual; Qualitative; Random; Repeat; SBMA; Screen; SMAX1; Spinal and bulbar muscular atrophy; Testicular feminization; TFM; Tissue; Tissue, unspecified; WB; Whole blood; Whole blood or Tissue

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

AR gene CAG repeats Molgen Ql (Bld/Tiss)AR gene CAG repeats [Presence] in Blood or Tissue by Molecular genetics methodAR gene CAG Rpt Bld/T QlAR gene.CAG repeatsMOLPATH.NUCREPEATAR gene CAG Repeats, Blood or tissue specimenPrThr

Frequently asked questions

Code details

Code21754-7
SystemLOINC
Display nameAR gene CAG repeats Molgen Ql (Bld/Tiss)
DescriptionAR gene.CAG repeats
Short nameAR gene CAG Rpt Bld/T Ql
ComponentAR gene.CAG repeats
PropertyPrThr
TimingPt
System (specimen)Bld/Tiss
ScaleOrd
MethodMolgen
ClassMOLPATH.NUCREPEAT
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0m
Last changed2.73

Consumer names

AR gene CAG Repeats, Blood or tissue specimen

Part names

AR gene.CAG repeatsPrThrPtBld/TissOrdMolgenAR gene CAG repeatsPresence or ThresholdPoint in time (spot)Blood or TissueMolecular genetics

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

LOINC Code 21754-7 | HealthAssure